642236271172 has 12 divisors (see below), whose sum is σ = 1123945376400. Its totient is φ = 321109020776.

The previous prime is 642236271119. The next prime is 642236271199. The reversal of 642236271172 is 271172632246.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2118922 + ... + 2402977.

It is an arithmetic number, because the mean of its divisors is an integer number (93662114700).

Almost surely, 2^642236271172 is an apocalyptic number.

It is an amenable number.

642236271172 is a deficient number, since it is larger than the sum of its proper divisors (481709105228).

642236271172 is a wasteful number, since it uses less digits than its factorization.

642236271172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4557410 (or 4557408 counting only the distinct ones).

The product of its digits is 338688, while the sum is 43.

The spelling of 642236271172 in words is "six hundred forty-two billion, two hundred thirty-six million, two hundred seventy-one thousand, one hundred seventy-two".